/* AI Visibility Tool — public marketing site
   "Signal Room" theme: instrument / control-room aesthetic.
   Near-black abyss + plotted grid, single ice-cyan signal accent,
   Space Grotesk headlines + IBM Plex Mono data labels.
   Static, crawlable, dependency-free. */

:root {
  color-scheme: dark;
  --bg: #060a0f;
  --bg-2: #080d13;
  --panel: #0b1119;
  --panel-2: #0e141d;
  --line: rgba(150, 176, 196, 0.11);
  --line-strong: rgba(58, 227, 255, 0.34);
  --grid: rgba(96, 148, 168, 0.09);
  --text: #e9f2f7;
  --muted: #7e93a4;
  --soft: #adbecc;
  --signal: #3ae3ff;
  --signal-deep: #1596b8;
  --up: #46e0b4;
  --warn: #ffb454;
  --danger: #ff6b7d;

  /* Back-compat aliases so any inline var() refs still resolve */
  --accent: var(--signal);
  --accent-2: var(--signal);
  --accent-3: var(--signal);
  --success: var(--up);
  --grad: linear-gradient(135deg, #3ae3ff 0%, #1596b8 100%);

  --radius: 10px;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
  --font: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --display: "Space Grotesk", var(--font);
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", "Cascadia Code", monospace;
  font-family: var(--font);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(900px 460px at 84% -10%, rgba(58, 227, 255, 0.10), transparent 62%),
    radial-gradient(760px 420px at 2% 2%, rgba(58, 227, 255, 0.05), transparent 58%),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  background-size: auto, auto, 46px 46px, 46px 46px, auto;
  background-position: center, center, center, center, center;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; }
h1, h2, h3 { line-height: 1.1; margin: 0; letter-spacing: -0.02em; font-family: var(--display); }
p { margin: 0; }

.wrap { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }

.gradient-text { color: var(--signal); text-shadow: 0 0 26px rgba(58, 227, 255, 0.4); }

/* Mono readout helper used across the page */
.mono { font-family: var(--mono); letter-spacing: 0.02em; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  color: #041016;
  background: var(--signal);
  box-shadow: 0 0 0 1px rgba(58, 227, 255, 0.5), 0 14px 34px rgba(58, 227, 255, 0.24);
}
.btn-primary:hover { background: #6cebff; box-shadow: 0 0 0 1px rgba(58, 227, 255, 0.7), 0 18px 44px rgba(58, 227, 255, 0.38); }
.btn-ghost {
  color: var(--text);
  background: rgba(58, 227, 255, 0.03);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--line-strong); color: var(--signal); }
.btn svg { width: 17px; height: 17px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(6, 10, 15, 0.78);
  border-bottom: 1px solid var(--line);
  box-shadow: inset 0 1px 0 rgba(58, 227, 255, 0.14);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 20px;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; }
.brand img { width: 38px; height: 38px; }
.brand span { font-size: 16px; font-family: var(--display); font-weight: 700; letter-spacing: -0.01em; }
.brand small { display: block; font-size: 10.5px; font-weight: 500; color: var(--muted); letter-spacing: 0.14em; text-transform: uppercase; font-family: var(--mono); }
.main-nav { display: flex; align-items: center; gap: 26px; }
.main-nav a.nav-link { color: var(--soft); font-weight: 500; font-size: 13px; font-family: var(--mono); letter-spacing: 0.02em; }
.main-nav a.nav-link:hover { color: var(--signal); }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; }

/* ---------- Hero ---------- */
.hero { padding: 88px 0 66px; position: relative; }
.hero-inner { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 54px; align-items: center; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 13px;
  border-radius: 6px;
  border: 1px solid var(--line-strong);
  background: rgba(58, 227, 255, 0.06);
  font-size: 11.5px;
  font-weight: 500;
  font-family: var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--soft);
  margin-bottom: 24px;
}
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 12px var(--signal); animation: pulse-dot 1.8s ease-in-out infinite; }
@keyframes pulse-dot { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }
.hero h1 { font-size: clamp(36px, 5.2vw, 58px); font-weight: 700; letter-spacing: -0.03em; }
.hero .lead { margin-top: 22px; font-size: 18px; color: var(--soft); max-width: 40ch; }
.hero-actions { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 14px; }
.hero-note { margin-top: 18px; font-size: 12px; color: var(--muted); font-family: var(--mono); letter-spacing: 0.02em; }

/* Instrument panel shared chrome (corner ticks) */
.hero-card, .feature, .preview-visual, .notice, form.card {
  position: relative;
}
.hero-card::before, .hero-card::after,
.preview-visual::before, .preview-visual::after {
  content: "";
  position: absolute;
  width: 12px; height: 12px;
  border: 1px solid var(--line-strong);
  pointer-events: none;
}
.hero-card::before { top: 8px; left: 8px; border-right: 0; border-bottom: 0; }
.hero-card::after { bottom: 8px; right: 8px; border-left: 0; border-top: 0; }
.preview-visual::before { top: 8px; left: 8px; border-right: 0; border-bottom: 0; }
.preview-visual::after { bottom: 8px; right: 8px; border-left: 0; border-top: 0; }

/* Hero preview: signal monitor */
.hero-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, var(--panel), var(--panel-2));
  box-shadow: var(--shadow);
  padding: 22px;
}
.hero-card .card-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.hero-card .card-top span { font-size: 11px; color: var(--muted); font-family: var(--mono); letter-spacing: 0.1em; text-transform: uppercase; }
.hero-card .pill { font-size: 10.5px; padding: 4px 10px; border-radius: 5px; background: rgba(58, 227, 255, 0.1); color: var(--signal); font-weight: 600; font-family: var(--mono); letter-spacing: 0.12em; display: inline-flex; align-items: center; gap: 7px; }
.hero-card .pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 8px var(--signal); }
.kpi-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 16px; }
.kpi-mini { border: 1px solid var(--line); border-radius: 8px; padding: 12px; background: rgba(58, 227, 255, 0.02); }
.kpi-mini small { display: block; font-size: 10px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; font-family: var(--mono); }
.kpi-mini b { display: block; font-size: 22px; margin-top: 5px; font-family: var(--mono); font-weight: 600; letter-spacing: -0.01em; }
.kpi-mini i { font-style: normal; font-size: 11px; color: var(--up); font-weight: 600; font-family: var(--mono); }
.spark {
  height: 100px; border-radius: 8px; border: 1px solid var(--line);
  background:
    linear-gradient(rgba(58, 227, 255, 0.05) 1px, transparent 1px) 0 0 / 100% 20px,
    linear-gradient(90deg, rgba(58, 227, 255, 0.05) 1px, transparent 1px) 0 0 / 33.33% 100%,
    linear-gradient(180deg, rgba(58, 227, 255, 0.06), rgba(58, 227, 255, 0) 78%);
  position: relative; overflow: hidden;
}
.spark svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.spark::after { content: "OSC · AI SESSIONS / DAY"; position: absolute; top: 8px; left: 10px; font-family: var(--mono); font-size: 9px; letter-spacing: 0.14em; color: var(--muted); }

/* ---------- Section shells ---------- */
section.block { padding: 66px 0; position: relative; }
section.block + section.block { border-top: 1px solid var(--line); }
.section-head { max-width: 660px; margin-bottom: 42px; }
.section-head .kicker { color: var(--signal); font-weight: 500; font-size: 11.5px; letter-spacing: 0.16em; text-transform: uppercase; font-family: var(--mono); display: inline-flex; align-items: center; gap: 8px; }
.section-head .kicker::before { content: "//"; opacity: 0.6; }
.section-head h2 { font-size: clamp(27px, 3.6vw, 40px); font-weight: 700; margin-top: 14px; }
.section-head p { margin-top: 15px; color: var(--soft); font-size: 17px; }

/* ---------- Feature grid ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: feat; }
.feature {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel), rgba(11, 17, 25, 0.5));
  padding: 26px 24px 28px;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  counter-increment: feat;
}
.feature::after {
  content: "0" counter(feat);
  position: absolute; top: 20px; right: 20px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; color: var(--muted);
}
.feature:hover { border-color: var(--line-strong); transform: translateY(-3px); box-shadow: 0 20px 44px rgba(0, 0, 0, 0.4), inset 0 0 0 1px rgba(58, 227, 255, 0.06); }
.feature .icon {
  width: 46px; height: 46px; border-radius: 9px;
  display: grid; place-items: center;
  background: rgba(58, 227, 255, 0.08);
  border: 1px solid var(--line-strong);
  margin-bottom: 20px;
}
.feature .icon svg { width: 23px; height: 23px; stroke: var(--signal); }
.feature h3 { font-size: 18px; }
.feature p { margin-top: 11px; color: var(--muted); font-size: 14.5px; }

/* ---------- Dashboard preview list ---------- */
.preview-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 32px; align-items: center; }
.preview-list { display: grid; gap: 14px; }
.preview-item { display: flex; gap: 14px; align-items: flex-start; }
.preview-item .tick {
  flex: none; width: 26px; height: 26px; border-radius: 6px; margin-top: 2px;
  display: grid; place-items: center; background: rgba(58, 227, 255, 0.08);
  border: 1px solid var(--line-strong);
}
.preview-item .tick svg { width: 15px; height: 15px; stroke: var(--signal); }
.preview-item strong { font-size: 15.5px; }
.preview-item p { color: var(--muted); font-size: 14px; margin-top: 3px; }
.preview-visual {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  padding: 22px; box-shadow: var(--shadow);
}
.bar-mock { display: grid; gap: 13px; }
.bar-mock .row { display: grid; grid-template-columns: 84px 1fr auto; gap: 12px; align-items: center; font-size: 12px; font-family: var(--mono); letter-spacing: 0.02em; }
.bar-mock .track { height: 9px; border-radius: 3px; background: rgba(58, 227, 255, 0.05); overflow: hidden; border: 1px solid var(--line); }
.bar-mock .track i { display: block; height: 100%; border-radius: 2px; background: linear-gradient(90deg, var(--signal-deep), var(--signal)); box-shadow: 0 0 10px rgba(58, 227, 255, 0.4); }
.bar-mock .val { color: var(--soft); font-variant-numeric: tabular-nums; }

/* ---------- Early access / advisory panel ---------- */
.notice {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    repeating-linear-gradient(90deg, rgba(58, 227, 255, 0.05) 0 2px, transparent 2px 8px) top / 100% 3px no-repeat,
    radial-gradient(700px 220px at 12% 0%, rgba(58, 227, 255, 0.1), transparent 62%),
    linear-gradient(180deg, var(--panel), var(--panel-2));
  padding: 42px;
  display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center;
}
.notice h2 { font-size: 27px; }
.notice p { margin-top: 13px; color: var(--soft); max-width: 60ch; }
.notice ul { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 9px; }
.notice li { display: flex; gap: 11px; color: var(--muted); font-size: 14.5px; }
.notice li::before { content: "▸"; color: var(--signal); }

/* ---------- FAQ ---------- */
.faq-list { display: grid; gap: 11px; max-width: 840px; counter-reset: faq; }
details.faq {
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel);
  padding: 2px 20px;
  counter-increment: faq;
}
details.faq[open] { border-color: var(--line-strong); background: var(--panel-2); }
details.faq summary {
  cursor: pointer; list-style: none; padding: 17px 0;
  font-weight: 600; font-size: 16px; display: flex; align-items: center; gap: 14px;
  font-family: var(--display);
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::before { content: "Q" counter(faq, decimal-leading-zero); font-family: var(--mono); font-size: 11px; color: var(--signal); letter-spacing: 0.08em; flex: none; }
details.faq summary::after { content: "+"; margin-left: auto; color: var(--signal); font-size: 22px; font-weight: 400; font-family: var(--mono); }
details.faq[open] summary::after { content: "\2013"; }
details.faq p { color: var(--muted); padding: 0 0 20px 30px; font-size: 14.5px; }

/* ---------- Contact form ---------- */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 40px; align-items: start; }
.contact-info h2 { font-size: clamp(26px, 3.4vw, 36px); font-weight: 700; }
.contact-info p { margin-top: 14px; color: var(--soft); }
.contact-info .info-item { margin-top: 20px; display: flex; gap: 12px; align-items: center; color: var(--soft); font-size: 14.5px; }
.contact-info .info-item svg { width: 20px; height: 20px; stroke: var(--signal); flex: none; }
form.card {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  padding: 28px; box-shadow: var(--shadow);
}
.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-size: 11.5px; font-weight: 500; margin-bottom: 8px; color: var(--soft); font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.08em; }
.form-field input,
.form-field textarea {
  width: 100%; padding: 12px 14px; border-radius: 8px;
  border: 1px solid var(--line); background: rgba(4, 8, 12, 0.6);
  color: var(--text); font-size: 15px; font-family: var(--font); transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-field input:focus,
.form-field textarea:focus { outline: none; border-color: var(--signal); box-shadow: 0 0 0 3px rgba(58, 227, 255, 0.12); }
.form-field textarea { min-height: 130px; resize: vertical; }
.form-field.invalid input,
.form-field.invalid textarea { border-color: var(--danger); }
.field-error { display: none; color: var(--danger); font-size: 13px; margin-top: 6px; font-family: var(--mono); }
.form-field.invalid .field-error { display: block; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-status { margin-top: 4px; margin-bottom: 14px; font-size: 14px; border-radius: 8px; padding: 12px 14px; display: none; font-family: var(--mono); }
.form-status.show { display: block; }
.form-status.ok { background: rgba(70, 224, 180, 0.1); border: 1px solid rgba(70, 224, 180, 0.4); color: var(--up); }
.form-status.err { background: rgba(255, 107, 125, 0.1); border: 1px solid rgba(255, 107, 125, 0.4); color: var(--danger); }
form.card .btn-primary { width: 100%; justify-content: center; }

/* ---------- Legal pages ---------- */
.legal { padding: 58px 0 74px; }
.legal .wrap { max-width: 840px; }
.legal h1 { font-size: clamp(30px, 4vw, 42px); font-weight: 700; }
.legal .updated { color: var(--muted); font-size: 13px; margin-top: 10px; font-family: var(--mono); letter-spacing: 0.04em; }
.legal h2 { font-size: 22px; margin-top: 40px; }
.legal p, .legal li { color: var(--soft); font-size: 16px; margin-top: 14px; }
.legal ul { padding-left: 22px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); margin-top: 44px; padding: 48px 0 30px; background: linear-gradient(180deg, transparent, rgba(58, 227, 255, 0.02)); }
.footer-top { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.footer-brand { max-width: 340px; }
.footer-brand p { margin-top: 14px; color: var(--muted); font-size: 14px; }
.footer-cols { display: flex; gap: 60px; flex-wrap: wrap; }
.footer-col h4 { font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; color: var(--muted); margin: 0 0 14px; font-family: var(--mono); }
.footer-col a { display: block; color: var(--soft); font-size: 14px; margin-bottom: 10px; }
.footer-col a:hover { color: var(--signal); }
.footer-bottom { margin-top: 38px; padding-top: 20px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: 12px; font-family: var(--mono); letter-spacing: 0.03em; }
.footer-bottom a:hover { color: var(--signal); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-inner, .preview-grid, .contact-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .notice { grid-template-columns: 1fr; }
  .main-nav { display: none; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: var(--bg-2); border-bottom: 1px solid var(--line); padding: 8px 20px 18px; }
  .main-nav.open { display: flex; }
  .main-nav a.nav-link { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .main-nav .nav-cta { margin-top: 14px; }
  .nav-toggle { display: inline-flex; background: transparent; border: 1px solid var(--line); border-radius: 8px; width: 44px; height: 40px; align-items: center; justify-content: center; }
  .nav-toggle svg { width: 22px; height: 22px; stroke: var(--text); }
  .header-cta-desktop { display: none; }
}
@media (min-width: 901px) {
  .main-nav .nav-cta { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto; }
}